Article
Agronomy
Xue Xiao, Xu Xu, Dongyang Ren, Quanzhong Huang, Guanhua Huang
Summary: Shallow groundwater plays a crucial role in supporting the sustainability of arid agroecosystems, especially in fragmented arid irrigated areas. Simulation results showed significant lateral groundwater flow and water/salt redistribution among different land-use fields in fragmented planting patterns, with non-irrigated natural land playing a significant role in salt accommodation.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Environmental Sciences
Dillon Nicholas Reio, Rene M. Price, Assefa M. Melesse, Michael Ross
Summary: The Florida Everglades wetland has been altered for agriculture and settlement, and the HID wetland restoration program used soil removal to eradicate invasive plants. The lack of soil cover and reduced evapotranspiration rates have led to changes in hydrological conditions and water chemistry within the HID.
Article
Environmental Sciences
Ting Wang, Daniel Obrist
Summary: Salt marsh estuaries act as both sources and sinks for mercury in estuarine water, with internal estuarine sources significantly enhancing mercury concentrations in the water. The study also suggests that high soil mercury accumulation in salt marshes may drive lateral export of mercury to the ocean.
ENVIRONMENTAL POLLUTION
(2022)
Article
Agronomy
Elvis F. Elli, Sotirios V. Archontoulis
Summary: In rainfed crop production regions like the US Corn belt, the presence of a shallow water table significantly affects crop productivity and variability in grain yield, as well as environmental nitrogen losses. Understanding the impact of climate and management scenarios on water table depth is crucial for designing sustainable cropping systems. However, there is a lack of comprehensive studies on how weather variability, climate change, and agronomic management practices collectively influence water table dynamics. To address this knowledge gap, the researchers conducted a systems evaluation using the APSIM framework. The results revealed that weather conditions were the primary factor influencing water table depth, with management practices such as subsurface drainage, tillage, and crop sequence having some influence. The study also projected slightly deeper water tables in the future due to increased temperatures and evapotranspiration, which could impact crop yields and sustainability metrics.
AGRONOMY FOR SUSTAINABLE DEVELOPMENT
(2023)
Article
Engineering, Civil
Shinjiro Ohkubo, Takashi Hirano, Kitso Kusin
Summary: Disturbances in tropical peat swamp forests have different impacts on transpiration (T) and evaporation (E). Using eddy fluxes and meteorological data, three methods were used to estimate T and E separately at three sites with different degrees of disturbance. The conductance method was found to be the most reasonable for estimating T and E. Lowering the groundwater level (GWL) reduced T, but T subsequently recovered due to tree acclimation. El Nino events decreased both T and E, mainly due to attenuation of incoming radiation and soil desiccation.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Stephen Balogh, Kate Mulvaney, Nathaniel Merrill, Amy Piscopo
Summary: Solving estuarine water quality problems, such as in Cape Cod, Massachusetts, is challenging and requires significant investment of resources and attention. A study found that a majority of estuaries in the area have nitrogen loading levels exceeding current conditions, with substantial amounts of legacy nitrogen in groundwater. Rapid investment in source control can effectively reduce nitrogen loading, but outcomes vary depending on the resources and attention given to the problem.
Article
Environmental Sciences
Benjamin Hagedorn, Mitsuyo Tsuda
Summary: This study quantified the freshwater component of submarine groundwater discharge (SGD) using radon and salinity mass balance models, and compared the results to groundwater recharge rates obtained from soil water balance modeling. The study found that freshwater SGD rates were similar to recharge estimates, highlighting the utility of radon and salinity mass balance models in calibrating groundwater yields.
Article
Environmental Sciences
David P. Dethier, Noah Williams, Jordan F. Fields
Summary: The hydrology of alpine and subalpine areas in the Colorado Front Range is changing due to warming and alterations in precipitation patterns. The study found that soil hydraulic conductivity is comparable to shallow aquifer hydraulic conductivity. Higher hydraulic conductivity was observed in alpine areas underlain by periglacial deposits and lower conductivity in till-covered subalpine areas. As temperatures rise and snowmelt occurs earlier, alpine soils may become more vulnerable to drought, impacting the connectivity between snowmelt streams and downstream areas.
Article
Environmental Sciences
Karim Alizad, James T. Morris, Matthew Bilskie, Davina L. Passeri, Scott C. Hagen
Summary: This study used an integrated hydrodynamic-marsh model to assess the vulnerability of the Plum Island estuary wetland system to sea-level rise. The results showed that although the vulnerability of the wetland is low, different sea-level rise scenarios can lead to changes in vegetation type and productivity. The study emphasized the importance of integrated modeling approaches that consider dynamic marsh feedbacks and the effects of varying hydrodynamics on the wetland system.
WATER RESOURCES RESEARCH
(2022)
Article
Agronomy
M. G. Mostofa Amin, S. M. Mubtasim Mahbub, Md. Moudud Hasan, Wafa Pervin, Jinat Sharmin, Md. Delwar Hossain
Summary: This study evaluated the effects of straw and plastic mulching and organic manure application on water fluxes in the root zone and maize yield. The results showed that these practices increased soil water storage and improved grain yield.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Water Resources
Thomas R. Cianciolo, Jacob S. Diamond, Daniel L. McLaughlin, Robert A. Slesak, Anthony W. D'Amato, Brian J. Palik
Summary: The study assessed the vulnerability of 15 black ash wetlands in northern Minnesota based on site hydrology, showing that drier sites are more sensitive to water level increases following ash mortality caused by invasive emerald ash borer. In comparison to wetter sites, drier sites face greater challenges in canopy recovery after ash loss.
HYDROLOGICAL PROCESSES
(2021)
Article
Water Resources
J. R. Kennedy, M. T. Bell
Summary: This study focuses on changes in groundwater storage and their relationship with groundwater-level changes in the groundwater basin underlying the City of Albuquerque. Repeat micro-gravity measurements were used to measure groundwater storage change from 2016 to 2021. The study produced a map of specific yield based on gravity-derived storage change and groundwater-level change, allowing inference of this property over a wide region.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)
Article
Geosciences, Multidisciplinary
Ashley N. Martin, Karina Meredith, Andy Baker, Marc D. Norman, Eliza Bryan
Summary: This study investigates the silicon isotopic composition of fresh and saline groundwater samples from Rottnest Island, Western Australia, revealing correlations between Si-30 values and water-aquifer interactions, groundwater residence time, and local hydrogeology. The increase in Si-30 values in fresh groundwater is attributed to removal of lighter Si isotopes into secondary minerals. The findings suggest that geologically young carbonate aquifers, like Rottnest Island, may be important sources of dissolved silicon in coastal regions with low riverine input and oceanic dSi concentrations.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2021)
Article
Agronomy
Ehsan Ghane, Manal H. Askar
Summary: This study compared the effects of shallow drains (75 cm) and deep drains (125 cm) on profitability and hydrology of subsurface drainage systems across the eastern USA. Results showed that shallow drains can reduce year-to-year corn yield variability but are less profitable than deep drains under certain conditions.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Agronomy
Yingjun She, Ping Li, Zhenjie Du, Xuebin Qi, Shuang Zhao, Tong Li, Wei Guo
Summary: Shallow groundwater plays a crucial role in water use and yield of winter wheat. Nitrogen (N) application affects crop water uptake and utilization, but its impact on groundwater use is not well understood. Excessive N application can lead to environmental problems. This experiment investigated the effects of different N fertilization rates on winter wheat grown in micro-lysimeters with alkaline soil and a groundwater depth of 0.6 m. Increasing N application significantly increased groundwater evaporation velocity and promoted crop growth and yield. However, high N application rates resulted in surface soil drought and increased nitrate accumulation in the vadose zone, leading to decreased water use efficiency and productivity. The optimal N application rate considering yield, water use, nitrate accumulation, and productivity was 219.42-289.53 kg/ha at a groundwater depth of 0.6 m.